Apparatus for molding greensand piston-cores



T. E. WOOD.

I APPARATUS FOR MOLDFNG GREENSAND PISTON CORES. APPLICATION FILED MAR.27, I9l9- RENE WED NOV. 25, 1919,

1 ,33 1 73 6 Patented Feb. 24, 1920.

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T. E. WOOD. APPARATUS FOR MOLDING GREENSAND PISTON CORES.

.- APPLICATION FILED MMLQT. l9l9- RENEWED NOV. 25, 1919.

Patented Feb. 24, 1920.

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. m2; ,uillllfl I UNITED sTA'rE-s orrion.

rrHomAs E. WOOD, or GREAT FALLS, MONTANA, AssmNon o woo'n a snrronn pMACHINE WORKS, or GREAT FALL TANA.

APPARATUS FOR MOLDING Application filed March 27-, 1919, serial No.285,407. neneweenmmber 25,1919;-

To 'a'llevkomtt'maymmam-f Be it known t hat l', 'THo-M-As E. WooD, acitizen of the United States, residing at Great Falls, in the county ofCascade and State of Montana, have invented certain new and usefulImprovements in Apparat-us for Molding Greensand Piston-Cores,

neoted with removable supporting rods,

whereby piston boss cores 1 of different shapes and sizes may beemployed and may be located at p'ointsspacedat different distances fromthe enclof the cylinder core.

' A further object "of the invention is to provide means whereby thelength of the green s'anjd core may be adjusted.

A further object oi the invention is to provide apparatus of theabove-mentioned haracter, which may be operated conveniently andrapidly.

' iO'ther' "b'edts and advantages of the invention will be apparent"during the course oi'thefollowing description. 7 I

In the accompanyingdrawings forming a part of this specification andin'which like numerals" are employed to designate like partsthroughoutthe same;

- Figure 1 is a central vertical longitudinal sec ion'al view throughapparatus ernhoclying my invention;

Fig. "2 is a horizontalsectional view, taken on line 2- 52 of Fig. 1.;

Fig. 3 is a similar View, taken on line 33 of Fig. 1;

Fig. 4: is a longitudinal sectional View, taken'onl'ne4- 4 of Fig. '1;

Fig.5 isla View similar to Fig. 1, with the inner pattern elementspartly removed from a the casing;

Specification of Letterslatent.

s, monmnnn commuter: or MON- GREENSAND PISTO -corms.

Patented Feb. 24.,- 1920;

set-n1 m. ausea;

6 is a perspective view of til-1e re movable pattern carrying Fig. 7 isa similar view of carryingbar, showing adifferent number of patternrings secured thereto; and,

Fig. 8 is a perspective view of the head attern.

In the drawings, wherein for the purpose ofillu'stration' is shown apreterred em-bodi- Inent of my invention, the numeral 10 designa'tes anouter cylindrical pattern oas ng, which may be ver tical lywiranged l inuse, but the invention is in no sense restricted to this arrangement.Theouter pattern casing 10 has both ends open, and is provided, as

' more clearly shown in Fig. 2, with a pair of; longitudinal interiorgrooves 11, removebly receiving pattern carryinv bars or elem-rents 12,adapted to slide longitudinally therein. There are preferably they areprovided" with semi-circular skirt reinforcing patterns 13, rigidlysecured thereto, by welding or thelike, or they may be formed integralwith "the bars 12.- The numeral 14 designates reinforcing rihipot terns,which are preferably 'sem-i oircular and carried by the bars 12.These'patterns 14 are preferably formed integral with the bars 12, butmay be detachable'if desired. Figs. 1, 4', 5 and fi, 1 have-shown onesetof the-patterns 14, while in Figs. 7,1 have shown the bar 12 providedwrthtwo patternsl l, it being 'underst'oodthat twee! rnole sets or thesepatterns may be enie ployedflf desired. Y

The numeral 1'5 de's-igiutte's wrist pin-boss patterns, which may I e ofany suitable shape or "size. These patterns 1' 5 arepreifl erablyprovided with openings 16, receiving screws 17, adapted to have screwthreaded engagement" within seleoted" openin*gs'18,"f0r1ned in the bars.It-"isthu's seen that the patterns 15 are readily" removable and may belongitudinally adjustedupon the bars- 12 and conneoted there'v'vith inad jnstment at difier'ent longitudinal tions. 7 v

The numeral 19 designates ring? reinforc'ement sleevepattern which'isslidably mounted within the outer casing patter-1i 10 to be adjustedlongitudinally therein and removed theretfwm. sleeve patter-11 .1%!

the 'patitem two of these bars, and

within the sleeve pattern 19, and is ad ust able therein and adapted toV be removed therefrom. The inner end of this head pattern 20. is closedby an end 21, the pattern being preferably hollow. The end 21 carriesinternal reinforcing rib patterns 22,

which may be formed integral therewith, and the head pattern is furtherprovided with a pair of longitudinal slots 23 for receiving longitudinalinternal reinforcing rib patterns 24. These rib patterns are arranged tocontact with the fore-shortened ends of one pattern 22 and contact withthe boss patterns 15, thereby forming longitudinal internal reinforcingribs ,in the molded piston which connect the piston bosses and the headof the piston. The patterns 24 may be removed from the grooves 23.

' The operation of the apparatus is as follows:

With theelementsof the apparatus as sembled as shown in Fig. 1, thegreen sand may be introduced into the same and suitably tamped. Theapparatus may be supported by placing the hollow head pattern 20' upon apost or upright, and after this tamping action, the outer casin pattern10 may be moved downwardly wit respect to the inner pattern elements, asindicated in Fig. 5. This downward movement of the outer casing patternelement may be con tinued until it has moved downwardly beyond the lowerends of the bars '12. The bars 12 and the pattern elements carriedthereby may now be removed from the green sand core. The ringreinforcement sleeve pattern 19 may now be moved downwardly withrelation to the head pattern 21, thereby separating these elements, andleaving the green sand core entirely supported by the head pattern 20.The patterns 24: may now be removed from the head pattern 20. The greensaid core is now removed from the head pattern and may be placed withinthe mold, of the desired diameter. The casting of the cylinder will thenproceed in the usual manner. The diameter of the piston cast will beregulated by the diameter of the mold, while its length will becontrolled by the adjustment of the head pattern 20 within the pattern19,

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as the preferred example of.

7 within the grooves, and wrist pin boss patterns detachably connectedwith the bars.

3. In apparatus of the character described, an outer pattern casingprovided with longitudinal grooves, bars slidable within-the grooves,and wrist pin boss patterns adjustably connected with 'thebars.

In apparatus of the character described, an outer pattern casingprovided with inner longitudinal grooves, bars adjustably mounted withinthe grooves, and patterns carried by the bars.

. 5. In apparatus of the character de-" scribed, an outer patterncasing, patterns arranged therein, and supports forthe patterns havingadjustable connection with the outer pattern casing. v

6. In apparatus of the character described, an outer pattern casin barsar ranged therein and adapted to e longitudinally adjusted with relationthereto, patterns carried by the bars, a ring reinforcement sleevepattern longitudinally adjustably mounted within the outer patternvcasing'and disposed inwardly of the bars, and a head pattern for theouter" pattern casing.

7 In apparatus of the character described, an outer pattern casing,supporting elements arranged therein and adapted to move longitudinallywith relation thereto,

patterns carried by'the supporting elements,-

a ring reinforcement sleeve attern longitudinally movably mounted outerpattern casing, and a head pattern longitudinally movably mounted withinthe ring reinforcement sleeve pattern.

8. In apparatus of the character described, an outer pattern casing,wrist pin boss patterns arranged within the outer pattern casing andadapted to move longitudinally with relation thereto, a ringreinforcement sleeve pattern longitudinally movably mounted within thepattern casing, and a head pattern longitudinally movably mounted withinthe ring reinforcement sleeve pattern. I

within the V 9.111 apparatus of the character d escribed, an outerpattern casing, wrist in boss patterns adapted to be arranged witliinthe outer pattern casing, a head pattern movably mounted within theouter pattern casing and provided. With longitudinal grooves, andlongitudinal internal reinforcing rib patterns arranged Within thegrooves and extending to the wrist pin boss patterns.

10. In apparatus of the character described, an outer pattern casing,Wrist in boss patterns adapted to be arranged Wit in 10 the outerpattern casing, a head pattern longitudinally movably mounted Within theouter pattern casing and provided at its end with transverse reinforcingrib patterns and having longitudinal grooves, and longitudinal internalreinforcing .rib patterns 15 THOMAS E. WOOD.

Witnesses:

- H. O. MERRITT, LA RUE SMrrH.

